Hey guys! I'm a newbie in the control area, so I'm gonna drop some thoughts here...
We want to control the opening of big silos (about 1900 tons).
I was thinking about using a PID control in which the process variable would be the current of the transporter.
And the Control Variable would be the position of the valve.
The control would run in a 1756-L62 ControlLogix.
The problem is: I don't have a position sensor to give me the exact position of the valve. We use inductive sensors that indicate if the valve is fully closed or fully opened (this one is not reached in a common operation).
So, my thinking is to estimate the opening of the valve based on the time passed opening and closing it in a way that I could use the result of the PID control (assuming that the output of the PID Control should be the position of the valve).
Could it work or would it be more like and endless road?
Thank you all!!
We want to control the opening of big silos (about 1900 tons).
The opening is done by a motor that is controlled by a VFD.
Then the product (coffee beans) goes to a transporter.
I was thinking about using a PID control in which the process variable would be the current of the transporter.
And the Control Variable would be the position of the valve.
The control would run in a 1756-L62 ControlLogix.
The problem is: I don't have a position sensor to give me the exact position of the valve. We use inductive sensors that indicate if the valve is fully closed or fully opened (this one is not reached in a common operation).
So, my thinking is to estimate the opening of the valve based on the time passed opening and closing it in a way that I could use the result of the PID control (assuming that the output of the PID Control should be the position of the valve).
Could it work or would it be more like and endless road?
Thank you all!!